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Wind power plant voltage regulation iterative learning control method and device

A technology of iterative learning control and voltage regulation, applied in circuit devices, wind power generation, electrical components, etc., can solve the problems of no pure linear theoretical formula relationship, PID control can not achieve good results, etc., to achieve the effect of optimal voltage regulation

Active Publication Date: 2020-09-15
GUODIAN UNITED POWER TECH
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Problems solved by technology

[0003] There is no pure linear theoretical formula relationship between wind farm grid-connected voltage and reactive power compensation, and the corresponding relationship between the two cannot be accurately obtained through formulas and calculations
Due to the nonlinear relationship between reactive power and voltage in wind farms, traditional PID control cannot achieve good results

Method used

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  • Wind power plant voltage regulation iterative learning control method and device
  • Wind power plant voltage regulation iterative learning control method and device

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Embodiment Construction

[0027] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0028] Generally speaking, iterative learning control is a control method for a trajectory tracking system that performs repetitive actions, and achieves the improvement of a certain control goal through iterative correction. Iterative learning control does not depend on the precise mathematical description model of the system, and can realize the control of nonlinear strong coupling dynamic system with high uncertainty within a given time range with a very simple algorithm. Based on the idea of ​​iterative learning control, combined with the practical application of reactive power regulation, a voltage segmented iterative learning control suitable for reactive power...

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Abstract

The invention provides a wind power plant voltage regulation iterative learning control method and device. The method comprises the following steps: acquiring grid-connected point voltage and reactivepower; dividing the grid-connected point voltage into a plurality of voltage intervals by taking the nominal voltage grid-connected point conversion value as a reference; performing iterative learning control or PI control on the reactive power of each voltage interval; and distributing a reactive power target value calculated according to iterative learning control or PI control to each wind turbine generator and a reactive power compensation device. The wind power plant voltage regulation iterative learning control method and device provided by the invention can realize the good control ofreactive power on the premise of not depending on an accurate mathematical description model of a system.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a wind farm voltage regulation iterative learning control method and device. Background technique [0002] The fluctuation of wind farm output power will cause grid voltage fluctuation or flicker. Excessive voltage deviation in the power system not only poses a threat to the stability of the system, but also affects the economic operation of the system. With the large-scale application of wind farms, the impact of new energy on system voltage is becoming more and more prominent. At present, the main method of regulating and stabilizing the voltage of wind farms is to adjust the reactive power, specifically: adjusting the reactive output of the unit, adjusting the reactive output of the reactive compensation device, and adjusting the tap of the transformer. [0003] There is no pure linear theoretical formula relationship between wind farm grid-connected voltage and...

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Application Information

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IPC IPC(8): H02J3/50H02J3/38
CPCH02J3/50H02J3/381H02J2300/22H02J2203/20Y02E10/76Y02E40/30
Inventor 袁凌高静方于天笑赵冰丁亮曹扬
Owner GUODIAN UNITED POWER TECH
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